off nearby Beit Lahiya, Jan 4, SPA -- Palestinian presidential candidateMahmoud Abbas called off a hospital visit Tuesday after twopowerful explosions _ apparently from Israeli tank shells _went off near his motorcade. Abbas had planned to visit the survivors of earlierIsraeli tank fire and had reached the hospital entrancewhen the explosions went off, shaking the ground. Hissecurity guards urged Abbas to leave the area, and themotorcade sped off.--SPA1436 Local Time 1136 GMT www.spa.gov.sa/229884